Cupressus guadalupensis

Serano Watson, Proceedings of the American Academy of Arts and Sciences, 1879, Vol. XIV,Contributions to American Botany, 2. Descriptions of some New Species of North American Plants, p. 300.

CUPRESSUS GUADALUPENSIS. A widely spreading tree, becoming 40 feet
high or more, and 2 to 5 feet in diameter, with grayish-brown bark cleaving off in thin plates and leaving the thin inner bark with a smooth
claret-red surface: branches drooping and branchlets very slender: foliage glaucous-green, the acute or acutish leaves very obscurely glandular
on the back: cones globose, an inch or more in diameter, of 6 or 8 very thick and strongly bossed scales: seeds numerous, large (3 lines long
or more).  On Guadalupe Island, off the coast of Lower California; distributed as C. macrocarpa in Dr. E. Palmer's collection
from that island. In cultivation about San Francisco, and likely to prove very valuable for ornamental purposes.